Sougouwiki lists the following actresses: 倉木みお/時坂ひな/白鳥美玲/小早川怜子/宮瀬リコ
They usually have them in order of appearing (and the first in the list is indeed in the first scene) so I'd say Riko Miyase (宮瀬リコ)
Sougouwiki lists the following actresses: 倉木みお/時坂ひな/白鳥美玲/小早川怜子/宮瀬リコ
They usually have them in order of appearing (and the first in the list is indeed in the first scene) so I'd say Riko Miyase (宮瀬リコ)